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Clear change log #46

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34 changes: 0 additions & 34 deletions CHANGELOG.md
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Version 0.1.0.0
===============

#### Extensible Records

* 'RecT' renamed to 'RecF' to avoid colliding with the naming scheme generally reserved for monad transformers. Record constructor names reflect this change.

* The "rec" suffix removed from the functions 'setRecF', 'getRecF', 'getRec', and 'setRec' renamed to prefer the less noise 'setF', getF', 'set', and 'get'.

* The selector constraint (.|) and (#) type synonym replaced with 'Has' constraint for readiblity.
```haskell
-- previously
type HasFooInt ctx = "foo" # Int .| ctx

-- ... is now
type HasFootInt ctx = Has "foo" Int ctx
```

* A new type 'Evident' and class 'HasDict' now give a uniform way for capturing typeclass evidence of extensible records.

* 'Rec' and 'RecT' instance declaration are no longer defined for the base case and inductive case. Instead, extensible record instances pass the responsibility witnessing a dictionary to a 'HasDict' superclass.
```haskell
-- old version
instance Show (Rec '[]) where
show RNil = ...

instance (Show x, Show xs) => Show (Rec (x ': xs)) where
show RNil = ...

-- new version
instance HasDict Show ctx => Show (Rec ctx) where
show Nil = ...
show Con {} = ...
```